This repeated only a few times before she apparently grew tired of my gentle approach. “Oh, quit being a tease and pound my ass like you frickin’ mean it!” she demanded.
Her directness, coupled with the fact that she clearly preferred it fast and hard, had me reeling, and with a primal growl, I immediately let loose and accelerated my thrusts to a speed more like what my instincts were crying out for.
“Augh!” Savannah’s breath caught in her throat as she got what she wanted. “Oh, yes! That’s it! Mmm!”
So I carried on with more or less the same momentum. After about five minutes, my member was practically covered in her natural lubricant. I gripped her hips and just kept ramming my cock into her, and I could feel my semen pooling in my glans and building up pressure. With her intensifying purrs and moans, Savannah wasn’t making it any easier to keep a lid on it, and when she let out a particularly warbling cry of bliss, I knew release was imminent. “Where do you want me to…?”
“Just cum inside me!”
With a drawling grunt, I shot multiple hot jets of seed deep into her pussy, my hips spasming against hers with each explosion. On the heels of that came the loudest moan I’d yet heard from her, and I can’t be sure, but I think I felt her hips spasm a few times as well, which was a good sign.
Breathing heavily I bent over and rested my torso upon hers as Savannah emitted a couple of half-moans/half-sighs indicating something like contentment (hopefully, anyway). “Do you need me to do anything extra, like, with my mouth or my fingers?” I asked.
“No,” came the still slightly breathless reply. “I’m good.”
I nodded against her back, and after a few seconds of noticing that Tim and Allison had finished shortly before us, I lifted myself off Savannah, who rose with a shiver and turned around to face me once more.
“I’m really glad you decided to join in the family tradition,” I said as I redressed myself. “It means a lot.”
She gave me a genuine smile as she pulled her own pants back up and re-fastened them. “I don’t think I’ll have any trouble getting used to this.”
“Me neither,” said Tim, still looking a bit dazed.
I laughed at my younger brother and ruffled his hair. “How’d he do?” I asked Allison.
“I think he’s a keeper,” she smirked back.
“Thatta boy!” I congratulated him by clapping a hand on his shoulder.
As was customary in our family, for roughly the first month after Savannah and Allison’s self-presentations, we were mutually vigilant for signs of jealousy or discomfort, just to be sure that all four of us were truly fine with the situation. Fortunately, no such signs emerged. In fact, if anything, Allison seemed at least mildly turned on when she witnessed me having my way with Savannah, and my little brother made me proud every time I saw him pleasure my wife. Sometimes, a sort of chain reaction seemed to occur. An encounter between me and Savannah would get Allison in the mood, and since I needed to recharge, she would turn to Tim for release. Tim certainly never complained.